1 files changed, 30 insertions, 0 deletions
diff --git a/tinyusb/tools/top.mk b/tinyusb/tools/top.mk
new file mode 100755
index 00000000..84523a55
--- /dev/null
+++ b/tinyusb/tools/top.mk
@@ -0,0 +1,30 @@
+ifneq ($(lastword a b),b)
+$(error This Makefile require make 3.81 or newer)
+endif
+
+# Detect whether shell style is windows or not
+# https://stackoverflow.com/questions/714100/os-detecting-makefile/52062069#52062069
+ifeq '$(findstring ;,$(PATH))' ';'
+CMDEXE := 1
+endif
+
+# Set TOP to be the path to get from the current directory (where make was
+# invoked) to the top of the tree. $(lastword $(MAKEFILE_LIST)) returns
+# the name of this makefile relative to where make was invoked.
+
+THIS_MAKEFILE := $(lastword $(MAKEFILE_LIST))
+TOP := $(patsubst %/tools/top.mk,%,$(THIS_MAKEFILE))
+
+ifeq ($(CMDEXE),1)
+TOP := $(subst \,/,$(shell for %%i in ( $(TOP) ) do echo %%~fi))
+else
+TOP := $(shell realpath $(TOP))
+endif
+#$(info Top directory is $(TOP))
+
+ifeq ($(CMDEXE),1)
+CURRENT_PATH := $(subst $(TOP)/,,$(subst \,/,$(shell echo %CD%)))
+else
+CURRENT_PATH := $(shell realpath --relative-to=$(TOP) `pwd`)
+endif
+#$(info Path from top is $(CURRENT_PATH))